Oklahoma City Thunder star forward Paul George had 18 to 20 ounces of fluid drained from his right elbow this summer.

George had blood in the bursa sac of his shooting elbow and it caused him discomfort throughout this past season.

“I had a huge sac, 18 to 20 ounces of blood just sitting in the sac of my elbow, so I had that aspirated,” George told reporters at Team USA training camp. “I was dealing with that for pretty much the whole season. That was causing a lot of frustration with shooting and playing. To be able to shoot again, to be able to feel confident in my shot, to not have that on my mind, playing on the court, I feel great moving forward.”

In his first season with the Thunder, George averaged 21.9 points while shooting 43.0 percent from the field and 40.1 percent from beyond the arc. The All-Star swingman also underwent a scope procedure on his left knee on May 9.

“The knee is doing good,” George said. “It still has a long way to go, but it looks like I’m doing well. I’m still working through some stuff and still working on trusting and putting full confidence in my leg. I’m a little ways away, but there’s no pain, there’s no swelling, there’s nothing I’m concerned about.”

George re-signed with the Thunder on a four-year deal worth $136.9 million.